Matt Knight @embeddedsec
Engineer-at-Large | Former CISO and VP @OpenAI United States Joined March 2015-
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I’m at SXSW moderating a session with @dartmouth on a student- and faculty-developed platform for student wellness. Join us at 2:30pm central to learn about Dartmouth’s leadership on AI. schedule.sxswedu.com/events/PP11616…
Codex Security—our application security agent—is now in research preview. openai.com/index/codex-se…
I shared this note with @OpenAI today. Onward!
Great conversation with Joel de la Garza on the @a16z podcast. We covered agentic security research with Aardvark, where AI and security are headed, and reflections on five-plus years @OpenAI. Thanks for having me! youtu.be/-clah3kPPHc
A new security agent called Aardvark:
Now in private beta: Aardvark, an agent that finds and fixes security bugs using GPT-5. openai.com/index/introduc…
Aardvark is a labor of love and mission for the whole team. We are super excited to bring it to you. Sign up for the beta immediately!!!
Now in private beta: Aardvark, an agent that finds and fixes security bugs using GPT-5. openai.com/index/introduc…
Introducing Aardvark, our agentic security researcher:
Now in private beta: Aardvark, an agent that finds and fixes security bugs using GPT-5. openai.com/index/introduc…
@sama @OpenAI Aardvark shows what’s possible, and now the real work begins: hill climbing, putting it to work, and patching the planet. Learn more and apply for beta access here: openai.com/index/introduc…
Proud to introduce Aardvark, our agentic security researcher powered by GPT-5. Aardvark hunts for vulnerabilities the way a security engineer would: by reading and analyzing code, writing and running tests, and proposing patches. Now in private beta. openai.com/index/introduc…
Now in private beta: Aardvark, an agent that finds and fixes security bugs using GPT-5. openai.com/index/introduc…
Introducing GPT-5 Our best AI system yet, rolling out to all ChatGPT users and developers starting today. openai.com/index/introduc…
LIVE5TREAM THURSDAY 10AM PT
gpt-oss is out! we made an open model that performs at the level of o4-mini and runs on a high-end laptop (WTF!!) (and a smaller one that runs on a phone). super proud of the team; big triumph of technology.
What do you want to create next?
@MichaelKratsios Congratulations! Fantastic news.
@jaimeblascob @defcon @OpenAI It’s at 1050 tomorrow at the AIxCC Stage. Title is “Eating Our Own Dogfood” though I don’t believe the title made it onto the agenda.
I’ll also be recapping my and @marcnewlin’s escapades in the Spectrum Collaboration Challenge on a panel about @DARPA competitions at 1720 today.
Excited to give the closing keynote at the @BlackHatEvents AI Summit in one hour. Come learn about how we’re equipping the security team with LLMs @OpenAI.
Pieter Ibelings @ibelings
18K Followers 11K Following Physicist, N4IP, Antennas, Space Systems, SDR, RF, RADAR , Phased Arrays, Satellites, PCB Design, AI - Build, baby, build! 🇺🇸🇺🇸🇺🇸
Daniel Estévez @ea4gpz
10K Followers 399 Following Everything space & RF. Amateur radio operator (EA4GPZ / M0HXM). PhD in Mathematics from @Matematicas_UAM. he/him
Travis Goodspeed @travisgoodspeed
26K Followers 4K Following Merchant of Dead Trees and Licensed Proselytizer of the Gospel of the Weird Machines with Pwnage, PoC, and Secular Rock.
IanJohnBuckley @IanJohnBuckley
1K Followers 788 Following ASIC/FPGA design, dumpster fires, open source, SDR+HDR, Spaaaaace, cybersecurity, and other mad stuff.
Cybergibbons 🚲🚲... @cybergibbons
47K Followers 3K Following Andrew Tierney. Head of hardware. IoT hacker. Proud resident of Hounslow. Full on Alpha Male.
Bastian Bloessl @bastibl
2K Followers 567 Following Research Group Leader @ Secure Mobile Networking Lab, TU Darmstadt; General Assembly @ GNU Radio; Maintainer @ FutureSDR
Luigi Cruz @luigifcruz
5K Followers 912 Following Hunting aliens with GPUs at the Allen Telescope Array. Building real-time pipelines for signals and graphics for fun. Creator of #CyberEther, PiSDR, and BLADE.
LaForge - @LaF0rge@ch... @LaF0rge
6K Followers 1K Following #Osmocom founder. Mobile Communications expert, former netfilter/iptables hacker, freedom fighter. Nerd. Mensch mit Kommandozeilenhintergrund. #retronetworking
Brendan Dolan-Gavitt @moyix
33K Followers 6K Following Building offsec agents: https://t.co/G9EtnC2Gl3 PGP https://t.co/3WXr0RfRkv
𝙐𝙎𝘼 𝙎𝙖... @usa_satcom
13K Followers 439 Following Satellite Communications. GOES (HRIT/GRB/SUVI), HRPT, Inmarsat, L/S/X/Ku-Band, DSN, Astronomy, Whiskey, Endurance Running, Adventure Racing, Climbing.
John Hammond @_JohnHammond
320K Followers 3K Following Cybersecurity Researcher @HuntressLabs || Just Hacking Training @JustHackingHQ w/ @ethicalhacker || https://t.co/UtsNJiyiEk || https://t.co/narO3syzIy
Justin Elze @HackingLZ
70K Followers 5K Following CTO @TrustedSec | Former Optiv/SecureWorks/Accuvant Labs/Redspin | Race cars
Andre @AndrePuschmann
1K Followers 426 Following srsRAN maintainer, father^2, photographer, music lover, coffee addict.
Aaronia AG @Aaronia_AG
17K Followers 16K Following Manufacturer of RF monitoring, direction finding, real-time spectrum analyzer, SDR, CUAS, IQ vector signal generator, network-analyzer, antennas, software & OEM
devnulling @devnulling
1K Followers 909 Following
UHF Satcom 🇬🇧 �... @uhf_satcom
21K Followers 753 Following Monitoring VHF to EHF 📡🛰️since Y2K. Microwaves / CNC / Electronics / Computers / Hacking / InfoSec - Ham Call M0EYT. Politics = instant unfollow + block 📻⚡️
Nathan West @nathanewest
427 Followers 218 Following DSP and ML for radio frequency astronomy and communications
cje @caseyjohnellis
29K Followers 5K Following human | troublemaker & troubleshooter | founder @bugcrowd @disclose_io, advisor | pioneer of #bugbounty as-a-service | opinions CC0 1.0 | #hacktheplanet
Great Scott Gadgets @GSGlabs
10K Followers 91 Following Makers of HackRF One, Cynthion, YARD Stick One, and more. We design open source tools for innovative people.
Cam So Sweet 🍬 @dennyloeb
10 Followers 1K Following pretty pink problems 💕 mutuals only but i follow back
Nozz @Nozz_
212 Followers 1K Following Coffee drinker certified OSCP/CE/WE. Denver fan boy and part-time reverse shell catcher. Highly interested in Bugbounty, Web & Mobile sec.
R K @rdkick
113 Followers 484 Following
Emma Ave @ave48271
225 Followers 7K Following Entrepreneur* Forex investment Trader/mining, Account manager Crypto Earn $5,000 weekly DM me for more information NFT MINER
dan1elnj @dan1elnj
4 Followers 301 Following
Stormtrooper @BenageriSachin
2 Followers 246 Following
Karina @karinanguyen
43K Followers 1K Following building @thoughtfullab, prev. AI research & product @OpenAI, @AnthropicAI, @maisonagi
Kevin Roose @kevinroose
172K Followers 3K Following NYT tech columnist, Hard Fork co-host, high-perplexity language model. Writing a book about AGI.
gwiz @_gwiz1_
0 Followers 1K Following
perfect4sec @perfect4sec
745 Followers 5K Following DFIR | Threat Intelligence | Malware Analyst | Researcher | Cybersecurity Proactive Defense Team
Miles Grimshaw @milesgrimshaw
13K Followers 4K Following Thrive Capital. @cursor_ai @chaidiscovery @turbopuffer @SocketSecurity @Revel_Software @meshoptical @doji_com @langchainai @benchling @monzo @segment @airtable
Shrey Jain @JainShrey98
13 Followers 160 Following
Sudhir Saharan @bytesbysudhir
49 Followers 1K Following Developing experiences | Lover of Music | Skateboarder | exploring the nuisances of earth
Erik Herring @ErikHerrin84463
61 Followers 964 Following Connecting people with technology, providing insights and planning to maximize IT investment value. Focused on Alternative Investment & Life Sciences firms.
3PRM @3PRMHQ
15 Followers 97 Following Third-party risk management with a built-in AI analyst, shared vendor intelligence, and continuous monitoring. Built by a CISO who needed this to exist.
i_eat_tensors - e/acc @i_eat_tensors
616 Followers 8K Following e/acc emergentist connectionist cybernetic millenarian who wants to hyperstitionally immanentize the eschaton working on autonomous capital maximization
Pete Mathias @pete_mathias
782 Followers 2K Following VC investor backing critical country competencies 🇺🇸 🤘
Dhruva Goyal @dhruvagoyal
602 Followers 1K Following founder @BugBase, pentest copilot. dropped out, OSCE3, OSWE, OSEP, OSED, OSCP | automating web/network blackbox pentesting with ai agents
Michael Bozzello @michaelbozzello
2K Followers 1K Following Dad | CPO | Former Head of Product @Stocktwits | Watching any documentary I can gives me instant expertise for tweeting.
Bella Lee @lee50660918
0 Followers 151 Following
Joshua @JoshuaWorth
494 Followers 2K Following Elevator Constructor, AI native Software Orchestrator, Technology Consultant | Everything through the lens of Sola Scriptura
Kowsalya @kowsalya1052000
4 Followers 245 Following
Daniel Chen @mathscifi_exnv
62 Followers 342 Following AI Geek @UnslothAI. Ex-NVIDIA NASA-endorsed projects. Math enthusiast and sci-fi dreamer.
Dave Blumenfeld @dblumenfeld
2K Followers 879 Following Dad to a 3 legged cat. Founding engineer @MultifactorCOM. Prev: founder Keypo (acquired). Passionate about privacy preserving cryptography and hardware.
git push 💀 @gitpushedagain
0 Followers 20 Following Professional "it works on my machine" guy 💻 Obsessed with AI × security × indie hacking
Mehar Shafaat Ullah @MeharShafaat1
6 Followers 189 FollowingOskar Boëthius Lissh... @avocade
982 Followers 6K Following Conductor of agents. Founder & CTO at @Multiply_co, Stockholm. Startup mentor, angel, shaper, product designer, full-stack eng. INTP. Postnihilism. Father of 3.
Laurent DeSegur @oldeucryptoboi
334 Followers 1K Following I like pigs. Pigs are very clean animals; they can't sweat. They are smart and have an excellent memory. Mother pigs sing to their babies. Pigs love belly rubs!
Jas @JasBogan
53 Followers 2K Following
Darcy Yee @yee_darcy
17 Followers 429 Following
Shlomi Oberman @shlomsks
44 Followers 1K Following
ResearchCommon @research_common
0 Followers 523 Following
Richard Kotite @marjeyoun
8 Followers 165 Following
Fredrik @frequencyflyer
31 Followers 2K Following
Matt Gannon @MattCGannon
72 Followers 345 Following
Chase Dalton @ChaseHDalton
55 Followers 544 Following Nuclear Navy, other stuff, Palantir, Cognition AI. Reducing the National Tech Debt one million lines of code at a time.
desnecessario1555 @cinquentaoitoum
0 Followers 1K Following
Anita @LadyGold364966
49 Followers 2K Following
Daniel Castillo @Daniel_Shinken
10 Followers 801 Following
Derek Cedarbaum @DerekCedarbaum
293 Followers 7K Following Product @ Red 6, #2 FTE | Built the world's first in-air augmented reality system for fighter pilots | 🇺🇸
0xf1rmware @0xf1rmware
17 Followers 1K Following binary exploitation, reverse engineering and fuzzing
Pieter Ibelings @ibelings
18K Followers 11K Following Physicist, N4IP, Antennas, Space Systems, SDR, RF, RADAR , Phased Arrays, Satellites, PCB Design, AI - Build, baby, build! 🇺🇸🇺🇸🇺🇸
SwiftOnSecurity @SwiftOnSecurity
409K Followers 9K Following computer security person. former helpdesk.
Daniel Estévez @ea4gpz
10K Followers 399 Following Everything space & RF. Amateur radio operator (EA4GPZ / M0HXM). PhD in Mathematics from @Matematicas_UAM. he/him
hackaday @hackaday
271K Followers 2K Following 🔥 Read: https://t.co/KG4TpCzO7H ☠️ Contribute: tips at hackaday dot com 👉 Projects: @hackadayio #Fediverse: @[email protected] 📒 Learn: https://t.co/p1jaCktSDt
Travis Goodspeed @travisgoodspeed
26K Followers 4K Following Merchant of Dead Trees and Licensed Proselytizer of the Gospel of the Weird Machines with Pwnage, PoC, and Secular Rock.
IanJohnBuckley @IanJohnBuckley
1K Followers 788 Following ASIC/FPGA design, dumpster fires, open source, SDR+HDR, Spaaaaace, cybersecurity, and other mad stuff.
Cybergibbons 🚲🚲... @cybergibbons
47K Followers 3K Following Andrew Tierney. Head of hardware. IoT hacker. Proud resident of Hounslow. Full on Alpha Male.
Matthew Green @matthew_d_green
154K Followers 1K Following I teach cryptography at Johns Hopkins. Mostly on BlueSky these days at https://t.co/GI4QlxYTdk.
Bastian Bloessl @bastibl
2K Followers 567 Following Research Group Leader @ Secure Mobile Networking Lab, TU Darmstadt; General Assembly @ GNU Radio; Maintainer @ FutureSDR
rtl-sdr.com @rtlsdrblog
36K Followers 496 Following News and tutorials related to the ultra cheap RTL-SDR software defined radio, and SDR in general. #rtlsdr #rtl2832 #sdr
Luigi Cruz @luigifcruz
5K Followers 912 Following Hunting aliens with GPUs at the Allen Telescope Array. Building real-time pipelines for signals and graphics for fun. Creator of #CyberEther, PiSDR, and BLADE.
LaForge - @LaF0rge@ch... @LaF0rge
6K Followers 1K Following #Osmocom founder. Mobile Communications expert, former netfilter/iptables hacker, freedom fighter. Nerd. Mensch mit Kommandozeilenhintergrund. #retronetworking
Dino A. Dai Zovi @dinodaizovi
39K Followers 1 Following Dino is human and can make mistakes. Please double-check responses.
𝙐𝙎𝘼 𝙎𝙖... @usa_satcom
13K Followers 439 Following Satellite Communications. GOES (HRIT/GRB/SUVI), HRPT, Inmarsat, L/S/X/Ku-Band, DSN, Astronomy, Whiskey, Endurance Running, Adventure Racing, Climbing.
Halvar Flake @halvarflake
45K Followers 3K Following Choose disfavour where obedience does not bring honour. I do math. And was once asked by R. Morris Sr. : "For whom?" @[email protected]
Andre @AndrePuschmann
1K Followers 426 Following srsRAN maintainer, father^2, photographer, music lover, coffee addict.
Richard Johnson @richinseattle
19K Followers 3K Following Computer Security, Reverse Engineering, and Fuzzing; Training & Publications @ https://t.co/mloVP6rPB7; hacking the planet since 1995; Undercurrents BOFH
GNU Radio Project @gnuradio
12K Followers 11 Following Official account of the GNU Radio Project, a free & open source toolkit for software radio used by scientists, engineers, and hobbyists. @[email protected]
devnulling @devnulling
1K Followers 909 Following
The OpenAI Foundation @FoundationOAI
7K Followers 0 Following OpenAI was founded in 2015 as a nonprofit; its mission is to ensure artificial general intelligence benefits all of humanity.
Alec Radford @AlecRad
71K Followers 303 Following
billy leonard @billyleonard
5K Followers 705 Following pogue life. sec @ A\, fmr @Google TAG, Global Head of Analysis of State Sponsored Hacking And Threats.
Brett Taylor @Brett_A_Taylor
17K Followers 976 Following Baseball Writer and Podcaster: @BleacherNation
Peter Steinberger �... @steipete
534K Followers 2K Following Polyagentmorous ClawFather. Came back from retirement to mess with AI and help a lobster take over the world. @OpenClaw🦞 + @OpenAI
Matt Schlicht @MattPRD
253K Followers 6K Following creator of @moltbook (@meta), talking to AI agents all day :) founded @octaneai @yesnoerror @zapchain, ycs12
Vijay Karunamurthy @vjkaruna
3K Followers 489 Following EIR @khoslaventures . @scale_AI, Apple, Google, YouTube.
TBPN @tbpn
667K Followers 966 Following Technology's daily show. Hosted by @johncoogan & @jordihays. Streaming live 11a-2p PT every weekday. Sign up for TBPN's daily newsletter at https://t.co/Nhf5ohjInO.
Pope Leo XIV @Pontifex
17.9M Followers 47 Following Welcome to the official account of His Holiness, Pope Leo XIV.
Kostya Kortchinsky @crypt0ad
8K Followers 139 Following 🇫🇷 grep'ing for memcpy() since 2002AD. Currently @ Databricks. Formerly GOOG, MSFT. Tweets are my own, and sometimes attempts at being funny.
Donny McCaslin @DonnyMcCaslin
9K Followers 1K Following Lullaby for the Lost | Out Now on @editionrecords
Kevin Weil 🇺🇸 @kevinweil
120K Followers 3K Following BoD @Cisco @nature_org LTC @USArmyReserve Ex CPO+Science @OpenAI, Pres @Planet, Head of Product @Instagram @Twitter ❤️ @elizabeth ultramarathons kids cats math
Bob McGrew @bobmcgrewai
34K Followers 1K Following Learning new things. Former Chief Research Officer at OpenAI, early exec at Palantir, early employee at Paypal.
Thinking Machines @thinkymachines
154K Followers 1 Following Thinking, beeping, and booping. @tinkerapi
Alex Burkardt @alexburkardt
525 Followers 1K Following Founder of Lowercase B. The future is already here, it's just not evenly distributed.
Michael Kratsios @MichaelKratsios
9K Followers 0 Following Personal account | Assistant to @POTUS & 13th @WHOSTP47 Director @mkratsios47 | Previously 4th CTO of the US, Under Secretary of War, Thiel Capital, @scale_AI
julia villagra @juliacvillagra
2K Followers 672 Following @coreautoai ex-Chief People Officer OpenAI | ex-HRT Head of People founder, Tertulia | board member, ICA SF | Mom
Bletchley Park @bletchleypark
55K Followers 3K Following Once the top-secret Home of the Codebreakers. 📅 Open daily. ⬇️ Book tickets online!
Defense Charts @DefenseCharts
39K Followers 1 Following 📈🤷♂️📊 dedicated to the presentational aesthetics of the defense-industrial complex // editor: @timhwang
DistrictCon @DistrictCon
2K Followers 32 Following A new DC hacker conference: Bringing together builders, breakers, and fixers to do cool shit. 🪩 Year 2: February 6-7, 2027 🪩 https://t.co/qYKu4hlyJR
Matt Targett @MatthewTargett
5K Followers 1K Following 🇦🇺 Swammer. Olympic Medalist, World Champion. engagement ≠ endorsement
Omkhar Arasaratnam @_omkhar
311 Followers 152 Following https://t.co/PsBN05Eqsb || https://t.co/aJ4RwewfJB || https://t.co/U2xuM1N95Z || https://t.co/npQi7LLTn1 || https://t.co/JUIQS205kQ
SSI Inc. @ssi
108K Followers 0 Following A straight shot to safe superintelligence. Join us https://t.co/hHla3vusDE.
Ben Nimmo @benimmo
27K Followers 974 Following Writer, linguist, diver. Principal Investigator, Intelligence & Investigations @OpenAI. RT ≠ endorsement.
Perri Adams @perribus
7K Followers 987 Following @Dartmouth ISTS Fellow & @SAISHopkins Adjunct Prof., inter alia. Former @DARPA, @DEFCON CTF, etc. @DistrictCon, @hexacon_fr, @LABScon_io CFP Review Boards
thomas🌦 @zemnmez
4K Followers 5K Following teaching computers love @openai. previously @google @twitch @ncsc. @forbesunder30 alumnus & @defcon black badge holder
Sandro Gianella @sGianella
5K Followers 5K Following Head of Europe Policy and Partnerships for OpenAI Previously Stripe, Google
Vinod Khosla @vkhosla
700K Followers 642 Following entrepreneurship zealot, grounded technology possibilist, believer in the power of ideas, passionate about sustainability & impact
Lawrence H. Summers @LHSummers
369K Followers 714 Following Charles W. Eliot University Professor and President Emeritus at Harvard. Secretary of the Treasury for President Clinton and Director of NEC for President Obama
Stephane Wrembel @StephaneWrembel
1K Followers 223 Following The Official Twitter Account of Guitar Virtuoso Stephane Wrembel.
Jordan Schneider @jordanschneider
54K Followers 4K Following Newsletter: https://t.co/j23uuLybUH join 75k readers Podcast: https://t.co/npkVVJalMk YouTube: https://t.co/nxmWB5nCTJ
Chris Krebs @C_C_Krebs
229K Followers 3K Following
Becky Waite @_rpwaite
262 Followers 446 Following Head of StratOps @openai | Formerly @meta @citymapper



























